Static synchronization compensator chaos balance control system based on cascade type DC-to-AC converter

Abstract

The invention relates to a chaotic balanced control system of a static synchronous compensator based on a cascade inverter, which is characterized in that the chaotic balanced control system comprises a digital signal process, a pseudorandom number generator unit, a comparing unit, a power driving circuit unit and a gate pole turn-off cascade H bridge circuit unit. The chaotic balanced control system has the advantages that the work of a pseudorandom number generator is controlled through using a high performance digital signal treatment chip and a method of chaotic map to produce a random number, thereby achieving to automatically balance the use rate of various cascade inverter units, and leading the use rate of various cascade units to be basically identical. On one side, the design cost of the cascade inverter is reduced, and the service life is prolonged. On the other side, the normal work of STATCOM is achieved, and the reliability and continuity demands of a circuit system are guaranteed.

Description

(1) Technical field: [0001] The invention belongs to the technical field of Static Synchronous Compensator (STATCOM—Static Synchronous Compensator) equipment in power systems, in particular to a cascaded inverter-based static synchronous compensator chaos equilibrium control system. (two) background technology: [0002] Static synchronous compensator can quickly and smoothly absorb inductive and capacitive reactive power in the power system. It has the advantages of no impact at startup, continuous adjustment, fast response, and small footprint. It has great advantages in terms of factor, load balance, and harmonic filtering. It has become a new generation of reactive power compensation device with fierce competition and is an important component of the Flexible Alternative Current Transmission System (FACTS-Flexible Alternative Current Transmission System). one. The cascade type inverter has good output waveform, large power capacity, and can reduce input harmonics when us...

AI Technical Summary

Problems solved by technology

When there are many stages in series, if the modulation coefficient is small, the utilization of the DC side power supply and switching devices will be unbalanced, and if the DC side power supply is a battery or energy storage capacitor, the voltage will be unbalanced

Unbalanced utilization makes some devices fully loaded or some devices are lightly loaded or no-loaded, causing early damage to some devices and reducing system life, and uneven load distribution increases the requirements for devices and heat dissipation

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